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Finding the Fourth Proportional to 100,550.56, 138,751.68 and 58,111.84

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Solution

The fourth proportional to 100,550.56, 138,751.68 and 58,111.84 is: 80,189.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,550.56 : 138,751.68 = 58,111.84 : x
  2. Step 2: Convert to fraction form
    100,550.56/138,751.68 = 58,111.84/x
  3. Step 3: Cross multiply
    100,550.56x = 138,751.68 × 58,111.84
  4. Step 4: Simplify right side
    100,550.56x = 8,063,115,427.89
  5. Step 5: Solve for x
    x = 8,063,115,427.89/100,550.56
  6. Step 6: Final answer
    x = 80,189.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.